Free
$0
Per month
- Limited projects
- Basic features
- Community support
- Individual use
Humanloop: Observability, Prompts & Evals
Founded 2022|London, United Kingdom|11-50 people
What is Humanloop?
Humanloop is a collaborative platform for developing, testing, and monitoring LLM applications. The platform provides tools for prompt engineering, evaluation, and production monitoring with team collaboration features. Humanloop enables systematic prompt development with version control, A/B testing, and human feedback collection. The platform serves teams building production LLM applications requiring robust development workflows and observability. Humanloop offers tiered pricing from free for individuals to enterprise plans for large organizations.
Strengths and tradeoffs
What this tool does well, and the limitations to keep in mind.
Pros
- Collaborative platform for team development
- Version control for prompts
- A/B testing and evaluation tools
- Free tier for individuals
Cons
- Pro tier at USD 99/mo may be steep for small teams
- Learning curve for full feature utilization
- Requires commitment to platform workflow
Plans & pricing
What's included in each plan, and how the tiers compare.
Pro
$99
Per month
- Unlimited projects
- Team collaboration
- Advanced evaluation
- Priority support
Enterprise
Custom
Annual contract
- Custom limits
- Dedicated support
- SOC 2 compliance
- Private deployment
Using Humanloop with Respan
Integrate Humanloop's collaborative LLM platform with Respan for systematic prompt development and testing. Enable team collaboration on prompts with version control and A/B testing. Combine Humanloop's workflow tools with Respan's production infrastructure.
- Collaborative prompt engineering with version control
- A/B testing for data-driven optimization
- Production monitoring and human feedback
- Team workflows for LLM development
Run Humanloop in production with Respan
10KFree traces/mo
1,000+Models
5 minSetup
Respan lets you trace LLM and agent calls across any model or framework, A/B test prompts on production traffic, and route requests across 1,000+ models through one gateway.
Try Respan freeBest Humanloop alternatives & competitors
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Compare Humanloop
Side-by-side comparisons with other tools in this category.
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Last verified: March 10, 2026